One, Two, Three, Four
Floating Floors
Getting Close and Far
Boundaries
Hodge Podge

100

The outer layer of the earth which is broken into many pieces called plates.

What is the crust?

100

An undersea mountain chain where new ocean floor is produced.
What is a mid-ocean ridge?

100

A device that bounces sound waves off underwater objects and records the echoes of these sounds.
What is sonar?

100

A section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust.

What is a plate?

100

You are most likely to find where two oceanic plates meet.

What are trenches?

200

Structures made by divergent boundaries.

What are Mid-Ocean Ridges?

200

The large, ancient landmass that was composed of all the continents joined together.
What is Pangaea?

200

The process that creates new sea floor as plates move away from each other at the mid-ocean ridges.
What is sea-floor spreading?

200

The place where volcanoes are most likely to be found.

What are oceanic and continental convergent boundaries?

200

Where can old oceanic crust be found?

Where farther away?

300

Made of molten iron and nickel in the liquid state. 1400 miles thick and ranges from 4000 to 9000 degrees.
What is the outer core?

300

-rock layers on coastlines of different continents match -same species of plant/animal fossils found on different continents separated by oceans -glacial ice in areas that are now located near the equator -salt/coal deposits (which only form in warm climates) found in areas with cold climates

What is evidence of continental drift?

300

molten material, magnetic stripes, drilling samples

What is evidence for sea-floor spreading?

300

The San Andreas fault in California and is an example of this kind of plate boundary.

What is a transform boundary?

300

Mountains found at divergent plate boundaries.

What are fault block mountains?

400

What two theories created the current theory of plate tectonics?

What are Continental Drift and Sea-Floor Spreading?

400

the formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges and its subsequent outward movement on either side

What is sea floor spreading?

400

Happens by molten material erupting and cooling.

What is the addition of new sea-floor?

400

This determines which plate comes out on top when plates collide.

What is density or the density of the plate?

400

The explanation for why tectonic plates move in different directions. 

What are convection currents?

500

What would be found on either side of a mid-ocean ridge?

What are stripes of older and colder rock the farther away you go.

500

Wegener's theory of how mountains formed.

What is folding and crumpling?

500

A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle.

What is a deep ocean trench?

500

Subducting plates are an example of this kind of boundary.

What is a convergent boundary?

500

Evidence that you cannot touch or see directly. Pieced together through different information so that inferences can be made. For example, seismic waves.
What is indirect evidence?